Hey Reel
My trim tabs are about inthe same place as yours, this creates alot of turbulance for your transducer (fish finder) and it may not read while underway. Mine won't work. I had to install a thru-hull about 26: fwd and on the stbd side. I already had a hole in the hull there for a water washdown.
Yours may work but mine didn't. P/s I wouldn't trade my tabs, I love them.
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Tis better to be quiet and thought a fool than open your mouth and prove it!!
1991 V-20 cuddy I/O 350 volvo duo prop, 1998 15ft Grumman 9.9 Johnson 
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